<?php
/**
 * 获取网站搜索的热门关键字
 *
 * @version   $Id: hotwords.lib.php 1 9:29 2010年7月6日 $
 * @package   DedeCMS.Taglib
 * @founder   IT柏拉图, https://weibo.com/itprato
 * @author    DedeCMS团队
 * @copyright Copyright (c) 2007 - 2021, 上海卓卓网络科技有限公司 (DesDev, Inc.)
 * @license   http://help.dedecms.com/usersguide/license.html
 * @link      http://www.dedecms.com
 */

/*>>dede>>
<name>热门关键词</name>
<type>全局标记</type>
<for>V55,V56,V57</for>
<description>获取网站搜索的热门关键字</description>
<demo>
{dede:hotwords /}
</demo>
<attributes>
<iterm>num:关键词数目</iterm>
<iterm>subday:天数</iterm>
<iterm>maxlength:关键词最大长度</iterm>
</attributes>
>>dede>>*/

function lib_hotwords(&$ctag, &$refObj)
{
    global $cfg_phpurl, $dsql;

    $attlist = "num|6,subday|365,maxlength|16";
    FillAttsDefault($ctag->CAttribute->Items, $attlist);
    extract($ctag->CAttribute->Items, EXTR_SKIP);

    $nowtime = time();
    if (empty($subday)) {
        $subday = 365;
    }

    if (empty($num)) {
        $num = 6;
    }

    if (empty($maxlength)) {
        $maxlength = 20;
    }

    $maxlength = $maxlength + 1;
    $mintime = $nowtime - ($subday * 24 * 3600);
    $dsql->SetQuery("SELECT keyword FROM `#@__search_keywords` WHERE lasttime>$mintime AND length(keyword)<$maxlength ORDER BY count DESC LIMIT 0,$num");
    $dsql->Execute('hw');
    $hotword = '';
    while ($row = $dsql->GetArray('hw')) {
        $hotword .= "　<a href='" . $cfg_phpurl . "/search.php?keyword=" . urlencode($row['keyword']) . "'>" . $row['keyword'] . "</a> ";
    }
    return $hotword;
}
